Fastening device for watch display



FIG. 1 is a top view of my new and ornamental design for a fastening device for watch display;

FIG. 2 is a bottom view thereof;

FIG. 3 is a front view;

FIG. 4 is a rear view;

FIG. 5 is a right side view;

FIG. 6 is a left side view thereof;

FIG. 7 is a top perspective view thereof; and,

FIG. 8 is a bottom perspective view thereof. 

The ornamental design for a fastening device for watch display, as shown and described. 